Alan Tudyk, who made an appearance in Abraham Lincoln: Vampire Hunter, was rumored for Ant-Man years ago. Edgar Wright denied such claims in 2010, quipping that it's "news to me." Rumors still surface for the fan-favorite actor and Joss Whedon (The Avengers) regular. Whedon would certainly not be opposed to working with Tudyk in The Avengers 2.
Justice League: Zack Snyder Teases Superman's True Resurrection